Gin saw filila machine



(No Modell.) 2 Sheets-Sheet 1.

F. M. SISK.

GIN SAW FILING MACHINE.

No; 296,471. Patented Apr. 8, 1884.

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(No Model.) Z'Sheets-Sheet :qu

P. M. SISK.

. GINQSAW FILING IYIIAGIIJL.v

No. 296,471. Patented Apr. 83.1884'.

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eiN-sAw-FILING MACHINE.

SPECIFICATION forming part of Letters Patent No. 296,471, dated April 8, 1884.

Application filed September 26, 188.3. (Ko model.)

To @Zi whom/aft may concern.-

Beit known that I, FRANK M. SISK, a citizen of the United States, residing at Newnan,

.approximately horizontal planes ohliquely against the cutting-edges of the teeth of cir cular saws, for the purpose of rendering such edges keen after they have become dull from use and my improved machine is particularly designed for sharpening ginsaws. j

. The object of my invention is to so arrange the parts of my machine as to enlarge the range of adjustment of the iiles, and to facilitate the operations of such adjustments, and also to produce an adjustable and automaticallyacting feeder, bymeans of which the necessary movements of the saw are effected for bringing the teeth successively into position to be acted upon by the files.

To the above ends my invention consists in certain details of construction, and in the combinations of the same, as hereinafter described and claimed.

In order that my invention maybe fully nnderstood, l2 will proceed to describe it with reference to the accompanying drawings, in` whioh-L Figure l is an upper side plan view of my improved machine. Fig. 2 is an under side plan view oi' the same. Fig. 3 is a Vertical longitudinal section of the saine on the line 3 3 of Figs. 1 and 2. Fig. 4 is a vertical longitudinal section of my improved machine on the line 4; d of Fig. l.

In the said drawings, A designates the frame of my improved machine, composed of two parallel side sections and two parallel transverse sections uniting the adjacent ends of the Aside sections, and thus forming an open parallelograni. This frame carries the working parts oi' the machine, and may be placed upon .a suitable bed-frame adapted also to receive the saw to be sharpened.

Extending outwardly and upwardly from the front end of the frame A, and cast intefport B. Thus it willv be seen that by loosening the thumb-screws c c" the brackets C may be raised or lowered, in which position they may loe held by tightening the screws, and by this means the iiles are adjusted to thefincli- A hole, ci, is formed' nation of the saw-teeth. through the top of each bracket G, to receive a sleeve, d, formed at its upper end with a ange, d', which rests upon the top of the corresponding brachet, C. rlhc lower ends of the sleeves d are each externally screw-threaded to receive a nut, di, by which said sleeves are clamped upon the brackets C'.

D D' designate two posts resting upon and extending vertically upward from the brackets C. Each of these posts is composed of a lower and an upper section united by a joint, di. rlhe lower portion of each post passes downward entirely through the corresponding sleeve, d, and is secured therein by a pin, 2, l

passing transversely through the lower extremity of the post and beneath the nut di, the arrangement being such as to permit the post to turn freely about a vertical axis and within its sleeve. The upper end oi' each oi' the upper post-sections is split, or formed with jaws d", between which lies one of the ille-bars E, presently to be described, in such manner as to permit said bars to work longitudinally between said jaws. Then closed, the jaws d are secured by screw bolt and nut, 3, which take up wear and lost motion in the iile-bars. A sleeve, D2, is interposed between the inner sides of the jaws dL and the file-bars E, and surrounding the latter like a sheath, as shown.

D designates two guide-pieces secured upon the inner sides oi' the lower post-sections, at the upper ends thereof, by the /bolts which form the pivots of the post-section joints. These gnide-pieces extend vertically upward IOO from their juncture with the posts, and each l is provided with a groove, d5, for the reception of one of two angle-bars, F, hereinafter described. Y

E E designate two file-bars, which extend through the jaws d, and carry each a iile upon its forward end. The front end of each file-bar E is turned off the center of the bar, in order to bring the files in the center line of motion of said bar, andcis provided with a chuck to receive the 'shank of the le. The files are held in the chucks of the file-bars by collars or nuts c, as shown.

Surrounding therear portion of each barF is a collar, c, which is secured adj ustably upon the bar Eby a set-screw or thumb-screw,

4. Surrounding the front portion of each barv E is a similar collar, c2, held by a similar screw, 4"

F designates the anglebars, each of which passes through the groove d5 of the corresponding guide-piece, D3, in a direction parallel with the adjacent iilebar E. At its rear end each angle-bar F is formed with a longitudinal slot,

p f, through which passes a stud, 5, hinged at its outer end to the collar c.

Between the outer side of the front end ofr pin, 5, passing through said link from side to side, and also through a lug, c, of said collar, projecting into the central opening of said link. The front ends of the angle-bars F are each connected adjustably to the adjacent link F by a set-screw, 5b, passing through the central opening of said link.

G designates two connecting-rods, the front end ofv each of which is jointed, as 6, to a head, g, pivoted by a pin or screw, G, upon the inner side of the adjacent angle-bar F. The joints 6 play upon vertical pivots. H H designate two levers, eafch of which is pivoted at h in bearings on the side of the frameA.

The upper end of each lever H is providedl with a longitudinal slot, L, through which extends a thumb-screw, 7, passing into the rear end of the adjacent connecting-rod G. Thus each connecting-rod G is adjustably connect ed to its lever H, for a purpose hereinafter set forth.

I designates a shaft extending transverselyT of the frame A through its side sections, and carrying at one end a crank, t', or other device,'by means of which power is applied to the machine.

Between the side sections of the frame A are two disks or wheels, J, mounted rigidly upon the shaft I, and having a space between their inner-sides to receive a cam, K, mounted rigidly on the shaft I, fora purpose hereinafter stated. Each disk J is provided on its outer side with a wavering or trefoil-like camgroove, j, and each lever H is provided at its lower extremity with an inwardly-extending pin, if, carrying a roller and working in the adjacent groove j; or any other form of traveler may be employed to workin said groove.

Upon the upper side of the support B is mounted the feed-bar L, carryinga hinged dog or pawl, l, upon its front end, said dog being designed to engage successively with the teeth of the sawand turn the latter sufficiently to bring the next tooth up to the files. The feed-bar L is formed in two sections, the front one of which overlaps the rear one, so as to permit said bar to be lengthened or shortened, as desired, the screws 8, which secure the front section to the rear section being passed through slots Z2 for the purpose, and thence into the upper side of the rear section. upon the frame A and'support B by screws 8, passed through slots Z in the feed-bar sections, and thence into the substance ofthe frame and support. .The feed-bar L is thrown forward by the engagement lof its rear end with the cam K.'

In order to retract the feed-bar L after it has been thrown forward by the cam K, I employ the two springs M M, each of which is secured at its rear end to the upper side of the rear feed-bar section by a screw, 9, or other suitable device. At its front end each -spring M is bent partially around a cuff, d5,

to which said spring is secured by a screw, 9", which passes through a slot, m, in the end of the spring, and also through the cuff and into the substance of the post D or D. The post D is somewhat higher than the post D, so that normally its file shall act on the next tooth to that upon which the file f the post D is acting.

` The operation of the above-described machine is as follows: The frame A being mount-A ed upon the bed-frame,-and the saw to be sharpened being also mounted on said bed-frame in proper position relative to the sharpeningfmachine, the height of the files is adjusted by raising or lowering the brackets C, so as to bring the iiles into contact with the saw-teeth. The posts D D are turned in the sleeves d d, so as `to bring the files against opposite sides of the saw-teeth; and, if necessary, the files are further adjusted to the saw-teeth by bending the posts D D at their joints. The feed-bar L is also adj usted. lengthwise, so as to bring the dog or pawl Z into engagement with the teeth of the saw, and the angle-bars F F and connectingrods G G are adjusted by their set-screws in the slots of the levers H I-I and in the links F F', so as to produce the proper length of throw forthe file-bars E E. Power is now applied to the shaft I, and as the latter turns the camgrooves 7' j of the disks .I impart three vibrations to the levers H for each complete revolution of the shaft I, and the vibratory move-V ments of the levers are imparted. to the files through the medium of the eonnecting-rods G G, angle-bars F F, and le-bars E E, causing the les to act with reciprocatory movements The two sections are secured movably c ICO IIO

against both sides of the cuttingfedges oi' the saw-teeth. Once in each complete revolution of the shaft I the cam K throws the feed-bar L forward, and by means of the dog or pawl l turns the saw a distance of one tooth, thus bringing the succeeding tooth into position to be operated upon by the iles. After each forward thrust of the feed-bar L it is thrown back by the springs M M, causing the pawl l to drop into 'engagement with the next lower tooth, in readiness to again turn the saw upon the next forward movement ofthe feed -bar L. The above described operationsv are successively repeated till the teeth of the saw have all been sharpened. y

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a saw-sharpening machine, the combination, with the grooved disks J J and pivoted levers H H, ofthe iile-bars E E, the posts D D',

j and the angle-bars and connecting-rods for imparting a properly-limited movement to said iilebars, substantially as described.

2. The combination, with the grooved disks J .l and cam K, oi' the pivoted levers H, filebars E, the angle-bars, connecting-rods G, the posts D D', the feed-bar L, and springs M, substantially as and for thepnrposes set forth.

3. The grooved disks .I and posts D D', composed of the jointed sections and arranged to turn at their bases, in combination with the iilebars E, pivoted levers H, the angle-bars, and connecting-rods G, substantially as and for the purposes specified.

4. The combination of the grooveddisks J, pivoted levers H, file-bars E, the angle-bars, and connecting-rods G, with the posts D D', each formed of two jointed sections, the jaws d, iianged sleeves d, nuts d2, pins 2, and the adjustable brackets C, substantially as and for the purposes stated. l

5. The grooved disks J, slotted pivoted levers H, posts D D', and iilebars E, in combination with the grooved guide-pieces D3, links F, angle-bars F, and connecting-rods G, substantially as set forth. Y

6. The frame A, carrying the adjustable brackets C, in combination with the shaft I, carrying grooved disks J, the posts D D', guide-pieces D3,f1le-bars E, angle-bars F, connecting-rods G, and levers H, arranged and operating substantially as and for the purposes set forth.

7. The grooved disks J and posts D D', in combination with the pivoted .levers H, slotted at their upper ends, the guide-pieces D3, le-bars E, having eccentric front extremities provided with chuck and carrying the nuts or collars e, the collars e c e2, the jointed connecting-rods G, having slotted rear ends, and the open links F, substantially as and for the purposes specified.

Intestiniony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

FRANK M. SISK.

W'itnesses:

J. H. SHELMETT, GEO. H. Cani-rioni.. 

